Made from zirconia, SUMU is a cutlery series that is 50% lighter than conventional metal cutlery. Zirconia has three characteristics. First, it is derived from minerals and its hardness is second only to diamonds and rubies. Next, it is also composed of two different kinds of crystals with different features, making it pliant and both durable and flexible at the same time. Lastly, it is a ceramic sintered at a high temperature of approximately 1,400 degrees. Because it is metal-free, Zirconia is suitable for people with metal allergies. It was first developed for medical purposes such as joint replacements and dental implants. Since then, its attractive aesthetics have led it to be used in the base of diamond rings and watch housing. However, a product that took advantage of both its material characteristics and aesthetics had not been developed. With this in mind, after 10 years of research and development, ZIKICO finally succeeded in developing a manufacturing method that applies both the characteristics and aesthetics of Zirconia in delicate designs for cutlery. SUMU cutlery does not affect the flavors of dishes as absolutely no metallic ions are released. You can simply focus on enjoying the flavors of your food. This matte zirconia cutlery gently reflects the lighting and will surely bring serenity to any dining scenario.